Filter cassette rack

ABSTRACT

A filter cassette rack and tracks wherein the rack is a three dimensional rectangular rack having at least two opposing open sides, sealing and non-sealing support tracks span the rack providing filter cassette guides and sealing means for a plurality of filter cassettes.

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT

Not applicable.

FIELD OF INVENTION

The present invention relates to filters, such as gas or air filters,utilizing a solid filtration media contained in a cassette wherein atleast one cassette is placed in a rack having tracks to removeablyreceive and hold the cassette(s) in a gas stream for filtering.

BACKGROUND OF THE INVENTION

It is known in the filtration arts to provide solid filtration media forgas or air filtration. Media used in the filtration of gases aretypically in the form of pellets confined in a container forming afiltration bed through which the gas stream to be filtered is passed.Filtration of selected components in the gas stream may be accomplishedby several different mechanisms such as by adsorption, absorption,and/or reaction with the filtration media.

The means to contact the gas stream with the filtration media typicallyinvolves placing the filtration media in a container to form a bed offiltration media through which a gas stream is passed. These containerstypically are in the form of a cassette that is removeably placed in oneor more racks in a housing. Cassettes typically hold the media inbetween walls having perforations or slots forming a bed of media whenfilled and have side walls or other structural features forming acassette that is insertable into a rack.

Typical racks have tracks that allow for the insertion, retention, andremoval of the cassettes within a gas stream. However, many of theseracks and/or tracks have failed to provide an efficient and reliablemethod of insertion, retention and/or removal of the cassette within thegas stream. Often times a seal is failed to be maintained betweencassettes and/or the sides of the rack permitting blow by of gases to befiltered, consequently reducing the efficiency of filtration.Additionally, many of these racks fail to provide tracks that allow foreasy insertion and removal of the cassettes.

SUMMARY OF THE INVENTION

The filter cassette racks and associated tracks of the present inventionprovides a cassette housing for holding filtration cassettes within agas stream. Several embodiments of cassette racks and associated tracksare disclosed herein.

One embodiment is of a horizontal flow filter cassette rack havingtracks for supporting a plurality of filter cassettes. The tracks aremounted longitudinally within one or more three dimensional rectangularracks forming a housing wherein each rack is shown formed by framemembers. Alternatively, selected support tracks may serve as framemembers as well. Each rack has a front and two opposing sides open. Theopen front allows for insertion and removal of filter cassettes. Theopposing sides are open to allow for the horizontal flow of a gas streamto enter and exit the filter cassettes. Another embodiment disclosedherein is of a vertical flow filter cassette rack having tracks forsupporting a plurality of filter cassettes. The tracks are mountedlongitudinally within one or more three dimensional rectangular racksforming a housing wherein each rack is formed by frame members. Eachrack has a front, top, and bottom open. The open front allows forinsertion and removal of a plurality of filter cassettes. The open topand bottom allows for the vertical flow of a gas stream to enter andexit the filter cassettes.

A variety of tracks for receiving and sealably securing a plurality offilter cassettes are also disclosed herein. Sealing, non-sealing, upper,lower and intermediate tracks are provided for both the horizontal andvertical flow filter cassette racks. Component features of the trackssuch as seals, guides, slides, and fastener slots are also disclosed.Many of the tracks disclosed herein may be used in a variety oflocations within a rack providing a lower, upper, sealing, ornon-sealing support track.

Other features of the present invention will become apparent uponreviewing the following detailed description of preferred embodiments ofthe invention, in conjunction with the drawings and the appended claims.

BRIEF DESCRIPTION OF THE DRAWINGS

Reference to the figures discloses several embodiments of the presentinvention and are not to be interpreted as limiting the scope of thepresent invention.

FIG. 1 is a perspective view of an embodiment of the filter cassetterack of the present invention showing a configuration for placement ofcassettes within a horizontal gas flow stream;

FIG. 2 is a front view of an embodiment of a lower sealing support trackof the cassette rack of FIG. 1;

FIG. 3 is a front view of an embodiment of an upper sealing supporttrack of the cassette rack of FIG. 1;

FIG. 4 is a front view of an embodiment of a lower non-sealing supporttrack of the cassette rack of FIG. 1;

FIG. 5 is a front view of an embodiment of an upper non-sealing supporttrack of the cassette rack of FIG. 1;

FIG. 6 is a front view of an embodiment of an intermediate sealingsupport track of the cassette rack of FIG. 1;

FIG. 7 is a front view of an embodiment of an intermediate non-sealingsupport track of the cassette rack of FIG. 1;

FIG. 8 is a perspective view of an embodiment of the filter cassetterack of the present invention showing a configuration for placement ofcassettes within a vertical gas flow stream;

FIG. 9 is a front view of an embodiment of a lower sealing support trackof the cassette rack of FIG. 8;

FIG. 10 is a front view of an embodiment of an intermediate sealingsupport track of the cassette rack of FIG. 8;

FIG. 11 is a front view of an embodiment of an upper non-sealing supporttrack of the cassette rack of FIG. 8;

FIG. 12 is a front view of an embodiment of an intermediate non-sealingsupport track of the cassette rack of FIG. 8;

FIG. 13 is a perspective view of an embodiment of a friction reductionslide that is an optional component part of a support track;

FIG. 14 is a perspective view of an embodiment of a seal that is anoptional component part a of support track;

FIG. 15 is a front view of an alternative embodiment of a lower sealingsupport track;

FIG. 16 is a front view of an alternative embodiment of an intermediatesealing support track; and

FIG. 17 is a perspective view of an embodiment of a gasket that is analternative optional component part a of support track;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The following detailed description is given primarily for clearness ofunderstanding and no unnecessary limitations are to be understood therefrom and modifications will become obvious to those skilled in the artupon reading the disclosure and may be made without departing from thespirit of the invention and scope of the appended claims.

FIG. 1 shows horizontal flow filter cassette housing 100 having a threedimensional rectangular rack formed by frame members 116, 118, and 120.Alternatively, selected support tracks could serve as frame members. Therack has a front and two opposing sides open. The open front allowsaccess to filter cassettes 102 for insertion and removal. The opposingsides are open to allow for the horizontal flow of a gas stream to enterand exit filter cassettes 102. The top is shown open to show theorientation of filter cassette 102 within filter cassette housing 100,but will be closed to prevent the escape of the gas stream beingfiltered. A prefilter assembly 150 and/or postfilter assembly 160optionallyjoin the open opposing sides of the rectangular rack.

Within the rectangular rack are at least four horizontal and substantialparallel tracks, lower sealing track 200, upper sealing track 300, lowernon-sealing track 400, and upper non-sealing track 500. It is to beunderstood that housing 100 could provide for a plurality of racksproviding for the flow through of gas in parallel and/or in seriesthrough each rack. Upper and a lower sealing support tracks 200 and 300span one of the two opposing open sides of the rack wherein uppersealing support track 300 is proximate the top of the rack and the lowersealing support track 200 is proximate the bottom of the rack. Upper andlower non-sealing support tracks 500 and 400 span the other of the twoopposing open sides of the rack wherein upper non-sealing support track500 is horizontally oriented sealing support track 300 and lowernon-sealing support track 400 is horizontally oriented with lowersealing support track 200. Intermediate sealing track 600 andintermediate non-sealing track 700 are optional, the incorporation ofwhich allows two or more cassettes 102 to be inserted into housing 100in a vertical alignment. The lengths of tracks 200, 300, 400, 500, 600,and 700 can vary allowing for the insertion of one or more cassettes 102in a horizontal alignment.

FIG. 2 shows lower sealing support track 200 of the embodiment of acassette housing 100. Lower sealing support track 200 is mounted withina lower corner portion of the rectangular rack having a filter cassetteengaging side on an upper side of inwardly extending cassette guide 204.Sealing support track 200 longitudinally extends with a fastener headretaining slot 214 and an oppositely opening gasket retaining slot 212formed therein where fastener head retaining slot 214 is proximate therack and vertically oriented with the filter cassette engaging side ofcassette guide 204. The gasket retaining slot 212 is proximate andoppositely opening fastener head retaining slot 214 and verticallyoriented with the filter cassette engaging side of cassette guide 204.Shown in this embodiment are two optional slide slots 206 formed in thefilter cassette engaging side of cassette guide 204. Within each slideslot 206 is a cassette slide 208. Cassette slides 208 are optional andthere may only be one or alternatively more than two. They provide for areduction of friction between support track 200 and a filter cassette102 that will slidingly engage cassette slides 208. Filter cassetteretaining flange 202 vertically depends from the filter cassetteengaging side of cassette guide 204 proximate an edge opposite fastenerhead retaining slot 214. Filter cassette retaining flange 202 engages aslot in filter cassette 102 holding a sealing surface of filter cassette102 against gasket 210. Also shown here is fastener 216 having a head infastener head retaining slot 214 for mounting in housing 100.Stabilizing flange 218 extends up from fastener head retaining slot 214providing a more stable mount within housing 100.

FIG. 3 shows an embodiment of an upper sealing support track 300 of thecassette housing 100. Upper sealing support track 300 is mounted in anupper corner portion of the rectangular rack having a filter cassetteengaging side on a lower side of inwardly extending cassette guide 304.Sealing support track 300 longitudinally extends with a fastener headretaining slot 314 and an oppositely opening gasket retaining slot 312formed therein where fastener head retaining slot 314 is proximate therack and vertically oriented with the filter cassette engaging side ofcassette guide 304. The gasket retaining slot 312 is proximate andoppositely opening fastener head retaining slot 314 and verticallyoriented with the filter cassette engaging side of cassette guide 304.In the embodiment shown, there are no optional slide slots formed in thefilter cassette engaging side of cassette guide 304. It is to beunderstood that optional slide slots could be formed in cassette guide304 allowing interchangeability with lower sealing support track 200,thus easing production and inventory requirements. Filter cassetteretaining flange 302 vertically depends from the filter cassetteengaging side of cassette guide 304 proximate an edge opposite fastenerhead retaining slot 314. Filter cassette retaining flange 302 engages aslot in filter cassette 102 holding a sealing surface of filter cassette102 against gasket 310. Stabilizing flange 318 extends up from fastenerhead retaining slot 314 providing a more stable mount within housing100.

FIG. 4 shows an embodiment of lower non-sealing support track 400 ofcassette housing 100. Lower non-sealing support track 400 is mountedwithin a lower corner portion of the rectangular rack opposite lowersealing support track 200 having a filter cassette engaging side on anupper side of inwardly extending cassette guide 404. Sealing supporttrack 400 longitudinally extends with a fastener head retaining slot 414proximate the rack and vertically oriented with the filter cassetteengaging side of cassette guide 404. Optionally, a gasket retaining slot(not shown) may be proximate and oppositely opening fastener headretaining slot 214 allowing interchangeability. Shown in this embodimentare two optional slide slots 406 formed in the filter cassette engagingside of cassette guide 404. Within each slide slot 406 is a cassetteslide 408. Cassette slides 408 are optional and there may only be one oralternatively more than two. Cassette slides 408 provide for a reductionof friction between support track 400 and a filter cassette 102 thatwill slidingly engage cassette slides 408. Stabilizing flange 418extends up from fastener head retaining slot 414 providing a more stablemount within housing 100.

FIG. 5 shows an embodiment of upper non-sealing support track 500 ofcassette housing 100. Upper non-sealing support track 500 is mountedwithin an upper corner portion of the rectangular rack opposite uppersealing support track 300 having a filter cassette engaging side on anupper side of inwardly extending cassette guide 504. Non-sealing supporttrack 500 longitudinally extends with a fastener head retaining slot 514proximate the rack and vertically oriented with the filter cassetteengaging side of cassette guide 504. Optionally, a gasket retaining slotmay be proximate and oppositely opening fastener head retaining slot 514allowing interchangeability. Additionally, slide slots may be formed inthe filter cassette engaging side of cassette guide 504 providingadditional interchangeability with other support tracks. Stabilizingflange 518 extends up from fastener head retaining slot 514 providing amore stable mount within housing 100.

FIG. 6 shows an embodiment of intermediate sealing support track 600 ofcassette housing 100. Intermediate sealing support track 600 is optionaland several may be mounted to a side portion enabling filter cassettehousing 100 to hold a plurality of filter cassettes in a stackedconfiguration as shown FIG. 1. Intermediate sealing support track 600has inwardly extending cassette guide 604. Sealing support track 600longitudinally extends with a fastener head retaining slot 614 and anoppositely opening gasket retaining slots 612 formed therein wherefastener head retaining slot 614 is proximate the rack and centrallyoriented with the filter cassette guide 604. Gasket retaining slots 612are proximate and oppositely opening fastener head retaining slot 614and are symmetrically vertically oriented with filter cassette guide604. Shown in this embodiment are two optional slide slots 606 formed inan upper side of cassette guide 604. Within each slide slot 606 is acassette slide 608 which are optional and there may only be one oralternatively more than two. They provide for a reduction of frictionbetween support track 600 and a filter cassette 102 that will slidinglyengage cassette slides 608. Filter cassette retaining flange 602vertically depends in both directions from cassette guide 604 proximatean edge opposite fastener head retaining slot 614. Filter cassetteretaining flange 602 engages a slot in an upper and lower filtercassette 102 holding a sealing surface of filter cassettes 102 againstgaskets 610. Stabilizing flanges 618 extend from fastener head retainingslot 614 providing a more stable mount within housing 100.

FIG. 7 shows an embodiment of intermediate non-sealing support track 700of cassette housing 100. Intermediate non-sealing support track 700 isoptional and several may be mounted to a side portion, each beingoppositely oriented an intermediate sealing support track 600 withincassette housing 100. Intermediate non-sealing support track 700 hasinwardly extending cassette guide 704. Non-sealing support track 700longitudinally extends with a fastener head retaining slot 714 proximatethe rack and centrally oriented with the filter cassette guide 704.Shown in this embodiment are two optional slide slots 706 formed in anupper side of cassette guide 704 each having a cassette slide 708.Stabilizing flanges 718 extend from fastener head retaining slot 714providing a more stable mount within housing 100.

FIG. 8 shows vertical flow filter cassette housing 800 having a threedimensional rectangular rack formed by frame members 816, 818, and 820.The open front allows access to filter cassettes 802 for insertion andremoval. The top and bottom are open to allow for the vertical flow of agas stream to enter and exit filter cassettes 802. It is to beunderstood that housing 800 could provide for a plurality of racksproviding for the flow through of gas in parallel and/or in seriesthrough each rack. Housing 800 shows two racks arrangement in series. Aprefilter assembly 850 and/or postfilter assembly 860 optionally jointhe open top and bottom of a rectangular rack. The side is shown open toshow the orientation of filter cassette 802 within filter cassettehousing 800, but will be closed to prevent the escape of the gas streambeing filtered.

Within the rectangular rack are at least four horizontal and substantialparallel tracks, two lower sealing tracks 900 and two upper non-sealingtracks 1100. Upper non-sealing tracks 1100 and a lower sealing supporttracks 900 span two opposing sides of the rack wherein upper non-sealingsupport tracks 1100 are proximate the top of the rack and the lowersealing support tracks 900 are proximate the bottom of the rack.Intermediate sealing tracks 1000 and intermediate non-sealing tracks1200 are optional, the incorporation of which allows two or morecassettes 802 to be inserted into housing 800 in a horizontal alignment.The lengths of tracks 900, 1100, 1000, and 1200 can vary allowing forthe insertion of one or more cassettes 802 in a horizontal alignment.

FIG. 9 shows an embodiment of lower sealing support track 900 ofcassette housing 800. Lower sealing support track 900 is mounted withinthe lower corner portions of the rectangular rack having a filtercassette engaging side on an inner side of upwardly extending cassetteguide 904. Sealing support track 900 longitudinally extends with afastener head retaining slot 914 and an oppositely opening gasketretaining slot 912 formed therein where fastener head retaining slot 914is proximate the rack. The gasket retaining slot 912 is proximate andoppositely opening fastener head retaining slot 914 and horizontallyoriented with the filter cassette engaging side of cassette guide 904.Shown in this embodiment is an optional slide slot 906 formed in thefilter cassette engaging side of cassette guide 904. Within slide slot906 is a cassette slide 908. Cassette slide 908 is optional, as is slideslot 906, and there may alternatively be more than one providing for areduction of friction between support tracks 900 and a filter cassette802 that will slidingly engage cassette slides 908. Filter cassetteretaining flange 902 horizontally depends from the filter cassetteengaging side of cassette guide 904 proximate an edge opposite fastenerhead retaining slot 914. Filter cassette retaining flange 902 engages aslot in filter cassette 802 holding a sealing surface of filter cassette802 against gasket 910. Stabilizing flange 818 extends out from fastenerhead retaining slot 914 providing a more stable mount within housing800.

FIG. 10 shows an embodiment of an optional intermediate sealing supporthousing 1000 of cassette housing 800. Several intermediate sealingsupport tracks 1000 may be mounted to a central portion of cassettehousing 800 enabling filter cassette housing 800 to hold a plurality offilter cassettes 802 in a horizontal configuration as shown FIG. 8.Intermediate sealing support housing 1000 has inwardly extendingcassette guide 1004 and longitudinally extends with a fastener headretaining slot 1014 and oppositely opening gasket retaining slots 1012formed therein. Fastener head retaining slot 1014 is proximate the rackand centrally oriented with filter cassette guide 1004. Gasket retainingslots 1012 are proximate and oppositely opening fastener head retainingslot 1014 and are symmetrically horizontally oriented with filtercassette guide 1004. Shown in this embodiment are two optional slideslots 1006, one proximate each gasket retaining slot 1006. Within eachslide slot 1006 is an optional cassette slide 1008. There may be aplurality of slide slots 1006 and slides 1008 proximate each gasketretaining slot 1006. Filter cassette retaining flange 1002 horizontallydepends in both directions from cassette guide 1004 proximate an edgeopposite fastener head retaining slot 1014. Filter cassette retainingflange 1002 engages a slot in adjacent filter cassettes 802 holding asealing surface of filter cassettes 802 against gaskets 1010.Stabilizing flanges 1018 extend from fastener head retaining slot 1014providing a more stable mount within housing 800.

FIG. 11 shows an embodiment of upper non-sealing support track 1100 ofcassette housing 800. Upper non-sealing support track 1100 is mountedwithin each upper corner portion of the rectangular rack above eachlower non-sealing support track 900 having a filter cassette engagingside on an inner side of downwardly extending cassette guide 1104.Non-sealing support track 1100 longitudinally extends with a fastenerhead retaining slot 1114 proximate the rack and vertically oriented withthe filter cassette engaging side of cassette guide 1104. Optionally, agasket retaining slot may be proximate and oppositely opening fastenerhead retaining slot 1114 allowing interchangeability. Additionally,slide slots may be formed in the filter cassette engaging side ofcassette guide 1104 providing additional interchangeability with othersupport tracks. Also shown here is fastener 1116 having a head infastener head retaining slot 1114 for mounting in housing 800.

FIG. 12 shows an embodiment of intermediate non-sealing support track1200 of the cassette housing 800. Intermediate non-sealing support track1200 is optional and several may be mounted to a lower portion ofcassette housing 800, each being oppositely oriented an intermediatesealing support track 1200 within cassette housing 800. Intermediatenon-sealing support track 1200 has downwardly extending cassette guide1204. Non-sealing support track 1200 longitudinally extends with afastener head retaining slot 1214 proximate the rack and centrallyoriented with the filter cassette guide 1204. Stabilizing flanges 1218extend from fastener head retaining slot 714 providing a more stablemount of cassettes 800 within housing 100. Also shown here is fastener1216 having a head in fastener head retaining slot 1214 for mounting inhousing 800.

FIG. 13 is a perspective view of an embodiment of friction reductionslide 1300 that is an optional component part of a support track.Friction reduction slides 1300 are comprised of a non-sticking, frictionreducing material such as nylon, Teflon™, or other polymeric materialthat is nonreactive with the gas being filtered. Many of the embodimentsof support tracks shown have slide slots for optionally retaining slide1113. Slide 13 longitudinally extends within a slide slot having a lowerportion 1302 mounted within a slide slot and a sliding surface 1304slidingly engaging a filter cassette. The embodiment of a slide shownhere is partially cylindrical in configuration having a substantiallyflat mounting surface.

FIG. 14 shows seal 1400 that is an optional component part a of asupport track. Seal 1400 is a pile seal comprised of a cloth likematerial and is advantageously incorporated into each sealing track.Seal 1400 has a base 1404 for mounting within a gasket retaining slotand depending sealing material 1402 which engages a sealing surface of afilter cassette when inserted into a filter cassette rack.

FIG. 15 shows an alternative embodiment of lower sealing support track1500 of cassette housing 800. Lower sealing support track 1500 ismounted within the lower corner portions of the rectangular rack havinga filter cassette engaging side on an inner side of upwardly extendingcassette guide 1504. Sealing support track 1500 longitudinally extendswith a fastener head retaining slot 1514 and an oppositely openinggasket retaining slot 1512 formed therein where fastener head retainingslot 1514 is proximate the rack. The gasket retaining slot 1512 isproximate and oppositely opening fastener head retaining slot 1514 andhorizontally oriented with the filter cassette engaging side of cassetteguide 1504. Shown in this embodiment are two slide slots 1506 formed inthe filter cassette engaging side of cassette guide 1504. Such aconfiguration enables sealing support track 1500 to support a largefilter cassette 800. Within slide slot 1506 is a cassette slide 1508.Filter cassette retaining flange 1502 horizontally depends from thefilter cassette engaging side of cassette guide 1504 proximate an edgeopposite fastener head retaining slot 1514. Filter cassette retainingflange 1502 engages a slot in filter cassette 802 holding a sealingsurface of filter cassette 802 against gasket 1510. Stabilizing flange1518 extends downward from slide slots 1506 providing a more stablemount within housing 800.

FIG. 16 shows an alternative embodiment of an optional intermediatesealing support track 1600 of cassette housing 800. Several intermediatesealing support tracks 1600 may be mounted to a central portion ofcassette housing 800 enabling filter cassette housing 800 to hold aplurality of filter cassettes 802 in a horizontal configuration as shownFIG. 8. Intermediate sealing support track 1600 has inwardly extendingcassette guide 1604 and longitudinally extends with a fastener headretaining slot 1614 and oppositely opening gasket retaining slots 1612formed therein. Fastener head retaining slot 1614 is proximate the rackand centrally oriented with filter cassette guide 1604. Gasket retainingslots 1612 are proximate and oppositely opening fastener head retainingslot 1614 and are symmetrically horizontally oriented with filtercassette guide 1604. Shown in this embodiment are four optional slideslots 1606, two proximate each gasket retaining slot 1606. Within eachslide slot 1606 is an optional cassette slide 1608. This configurationprovides a larger sliding surface enabling intermediate sealing supporttrack 1600 to provide support for a larger filter cassette 802. Filtercassette retaining flange 1602 horizontally depends in both directionsfrom cassette guide 1604 proximate an edge opposite fastener headretaining slot 1614. Filter cassette retaining flange 1602 engages aslot in adjacent filter cassettes 802 holding a sealing surface offilter cassettes 802 against gaskets 1610. Stabilizing flanges 1618extend downward from outer slide slots 1606 providing a more stablemount of a larger cassette within housing 800.

FIG. 17 shows an embodiment of a gasket that is an alternative to seal1400 as a component part a of a sealing support track. Gasket 1700 is alongitudinally extending hollow core extrusion gasket comprised of arubber like material and may be incorporated into each sealing track.Gasket 1700 has a base 1702 for mounting within a gasket retaining slotand sealing ribs 1704 formed in a sealing surface which engage a sealingsurface of a filter cassette when inserted into a filter cassette rack.

The novel filter cassette racks and associated tracks of the instantinvention provides a cassette housing for holding filtration cassettesin a variety of configurations within a gas stream. Horizontal and avertical flow filter cassette racks having a variety of novel tracks forsupporting a plurality of filter cassettes. Open fronts allows for easyinsertion and removal of filter cassettes. A variety of tracks forreceiving and sealably securing a plurality of filter cassettes in avariety of configurations are also disclosed herein. Many of thesetracks are interchangeable with one another. Novel component features ofthe tracks such as seals, guides, slides, and fastener slots are alsodisclosed herein.

1. A horizontal flow filter cassette rack comprising: a threedimensional rectangular rack wherein at least a front and two opposingsides are open; an upper and a lower sealing support track spanning oneof said two opposing sides of said rack wherein said upper sealingsupport track is proximate the top of said rack and said lower sealingsupport track is proximate the bottom of said rack; and an upper and alower non-sealing support track spanning the other of said two opposingsides of said rack wherein said upper non-sealing support track ishorizontally oriented with said sealing support track and said lowernon-sealing support track is horizontally oriented with said lowersealing support track.
 2. The horizontal flow filter cassette rack ofclaim 1 wherein said lower sealing support track is mounted within saidrack having a filter cassette engaging side on an inwardly extendingcassette guide, said sealing support track is longitudinally extendingwith a fastener head retaining slot and an oppositely opening gasketretaining slot formed therein where said fastener head retaining slot isproximate said rack and vertically oriented with said filter cassetteengaging side of said cassette guide and said gasket retaining slot isproximate said fastener head retaining slot and vertically oriented withsaid filter cassette engaging side of said cassette guide, and a filtercassette retaining flange vertically depending from said filter cassetteengaging side of said cassette guide proximate an edge opposite saidfastener head retaining slot.
 3. The horizontal flow filter cassetterack of claim 1 wherein said upper sealing support track is mountedwithin said rack having a filter cassette engaging side on an inwardlyextending cassette guide, said sealing support track is longitudinallyextending with a fastener head retaining slot and an oppositely openinggasket retaining slot formed therein where said fastener head retainingslot is proximate said rack and vertically oriented with said filtercassette engaging side of said cassette guide and said gasket retainingslot is proximate said fastener head retaining slot and verticallyoriented with said filter cassette engaging side of said cassette guide,and a filter cassette retaining flange vertically depending from saidfilter cassette engaging side of said cassette guide proximate an edgeopposite said fastener head retaining slot.
 4. The horizontal flowfilter cassette rack of claim 1 wherein said lower non-sealing supporttrack is mounted within said rack having an inwardly extending cassetteguide, said non-sealing support track has a fastener head retaining slotproximate said rack and vertically oriented with a filter cassetteengaging side of said cassette guide.
 5. The horizontal flow filtercassette rack of claim 1 wherein said upper non-sealing support track ismounted within said rack having an inwardly extending cassette guide,said non-sealing support track has a fastener head retaining slotproximate said rack and vertically oriented with a filter cassetteengaging side of said cassette guide.
 6. The horizontal flow filtercassette rack of claim 1 wherein said upper and said lower sealingsupport tracks have at least one intermediate sealing support trackmounted therebetween, said at least one intermediate sealing supporttrack is mounted within said rack having an upper and a lower filtercassette engaging side on an inwardly extending cassette guide and afilter cassette retaining flange vertically depending in both directionsfrom said cassette guide proximate an edge opposite said fastener headretaining slot.
 7. The horizontal flow filter cassette rack of claim 6wherein said upper and said lower non-sealing support tracks have atleast one intermediate non-sealing support track mounted therebetween,an intermediate sealing support track is mounted within said rackopposite each of said intermediate sealing support tracks, each of saidintermediate non-sealing support tracks has an inwardly extendingcassette guide substantially opposite each inwardly extending cassetteguide of each of said intermediate sealing support tracks.
 8. Thehorizontal flow filter cassette rack of claim 1 wherein said upper andsaid lower sealing support tracks have sealing member in each gasketretaining slot.
 9. The horizontal flow filter cassette rack of claim 8wherein said sealing member is a pile seal.
 10. The horizontal flowfilter cassette rack of claim 8 wherein said sealing member is a hollowcore extrusion gasket.
 11. The horizontal flow filter cassette rack ofclaim 6 wherein said intermediate sealing support tracks have gasketretaining slots proximate and oppositely opening said fastener headretaining slot and symmetrically oriented with said cassette guide, eachgasket retaining slot has a sealing member therein.
 12. The horizontalflow filter cassette rack of claim 1 wherein said lower support trackseach have a cassette guide with a cassette engaging side and at leastone slide slot longitudinally formed therein, each slide slot has acassette slide mounted within said at least one slide slot.
 13. Thehorizontal flow filter cassette rack of claim 12 wherein said cassetteslide is partially cylindrical in configuration having a substantiallyflat mounting surface
 14. The horizontal flow filter cassette rack ofclaim 6 wherein said intermediate support tracks each have a cassetteguide with a cassette engaging side and at least one slide slotlongitudinally formed therein, each slide slot has a cassette slidemounted within said at least one slide slot.
 15. The horizontal flowfilter cassette rack of claim 7 wherein said intermediate support trackseach have a cassette guide with a cassette engaging side and at leastone slide slot longitudinally formed therein, each slide slot has acassette slide mounted within said at least one slide slot.
 16. Avertical flow filter cassette rack comprising: a three dimensionalrectangular rack wherein at least a top, bottom and front are open; alower sealing support track spanning each side adjacent said front, eachlower sealing support track being proximate the bottom of said rack andretained therein with a plurality of fasteners having heads within afastener retaining slot longitudinally extending each of said lowersealing support tracks, each of said lower sealing support tracks havinga longitudinally extending gasket slot formed in an inward sideoppositely opening said fastener retaining slot; and an uppernon-sealing support track spanning each side adjacent said frontproximate the top of said rack wherein each of said upper non-sealingsupport tracks are vertically oriented with each said lower sealingsupport tracks.
 17. The vertical flow filter cassette rack of claim 16wherein said lower sealing support tracks are mounted within said rackhaving a filter cassette engaging side on an inwardly extending cassetteguide, said sealing support track is longitudinally extending with afastener head retaining slot and an oppositely opening gasket retainingslot formed therein where said fastener head retaining slot is proximatesaid rack and vertically oriented with said gasket retaining slot, and afilter cassette retaining flange horizontally depending from said filtercassette engaging side of said cassette guide proximate an edge oppositesaid fastener head retaining slot.
 18. The vertical flow filter cassetterack of claim 17 wherein said upper non-sealing support tracks aremounted within said rack having a filter cassette engaging side on aninwardly extending cassette guide, said non-sealing support track islongitudinally extending with a fastener head retaining slot formedtherein where said fastener head retaining slot is proximate said rack.19. The vertical flow filter cassette rack of claim 16 wherein saidupper support tracks have at least one intermediate non-sealing supporttrack mounted therebetween, said at least one intermediate non-sealingsupport track is mounted within an upper side of said rack with aplurality of fasteners having heads within a fastener retaining slot, acassette guide extends centrally and opposite said fastener retainingslot, below each of said intermediate non-sealing support track is anintermediate sealing support track having a cassette guide extendingfrom a lower portion of said rack toward said cassette guide of saidintermediate non-sealing support track, each cassette guide of saidintermediate sealing support tracks has a filter cassette retainingflange horizontally depending in both directions from said intermediatesealing cassette guide proximate an edge opposite a fastener headretaining slot.
 20. The vertical flow filter cassette rack of claim 16wherein said lower support tracks each have at least one slide slotlongitudinally formed therein substantially parallel said gasket slot,each slide slot has a cassette slide mounted therein.
 21. The verticalflow filter cassette rack of claim 20 wherein said cassette slide ispartially cylindrical in configuration having a substantially flatmounting surface
 22. The vertical flow filter cassette rack of claim 16wherein said lower sealing support tracks have sealing member in eachgasket retaining slot.
 23. The horizontal flow filter cassette rack ofclaim 22 wherein said sealing member is a hollow core extrusion gasket.